using System;
using System.Collections;
using Server.Network;
using Server.Mobiles;
using Server.Targeting;

namespace Server.Spells.Necromancy
{
	public class MindRotSpell : NecromancerSpell
	{
		private static SpellInfo m_Info = new SpellInfo(
				"Mind Rot", "Wis An Ben",
				203,
				9031,
				Reagent.BatWing,
				Reagent.PigIron,
				Reagent.DaemonBlood
			);

		public override TimeSpan CastDelayBase { get { return TimeSpan.FromSeconds( 1.5 ); } }

		public override double RequiredSkill{ get{ return 30.0; } }
		public override int RequiredMana{ get{ return 17; } }

		public MindRotSpell( Mobile caster, Item scroll ) : base( caster, scroll, m_Info )
		{
		}

		public override void OnCast()
		{
			Caster.Target = new InternalTarget( this );
		}

		public void Target( Mobile m )
		{
			if ( HasMindRotScalar( m ) )
			{
				Caster.SendLocalizedMessage( 1005559 ); // This spell is already in effect.
			}
			else if ( CheckHSequence( m ) )
			{
				SpellHelper.Turn( Caster, m );

				/* Attempts to place a curse on the Target that increases the mana cost of any spells they cast,
				 * for a duration based off a comparison between the Caster's Spirit Speak skill and the Target's Resisting Spells skill.
				 * The effect lasts for ((Spirit Speak skill level - target's Resist Magic skill level) / 50 ) + 20 seconds.
				 */

				 if ( m.Spell != null )
					m.Spell.OnCasterHurt();
				
				m.PlaySound( 0x1FB );
				m.PlaySound( 0x258 );
				m.FixedParticles( 0x373A, 1, 17, 9903, 15, 4, EffectLayer.Head );

				TimeSpan duration = TimeSpan.FromSeconds( (((GetDamageSkill( Caster ) - GetResistSkill( m )) / 5.0) + 20.0) * (m.Player ? 1.0 : 2.0 ) );
				m.CheckSkill( SkillName.MagicResist, 0.0, 120.0 );	//Skill check for gain

				if ( m.Player )
					SetMindRotScalar( Caster, m, 1.25, duration );
				else
					SetMindRotScalar( Caster, m, 2.00, duration );

				HarmfulSpell( m );
			}

			FinishSequence();
		}

		private static Hashtable m_Table = new Hashtable();

		public static void ClearMindRotScalar( Mobile m )
		{
			if (!m_Table.ContainsKey(m))
				return;

			BuffInfo.RemoveBuff( m, BuffIcon.Mindrot );
			MRBucket tmpB = (MRBucket)m_Table[m];
			MRExpireTimer tmpT = (MRExpireTimer)tmpB.m_MRExpireTimer;
			tmpT.Stop();
			m_Table.Remove(m);
			m.SendLocalizedMessage(1060872); // Your mind feels normal again.
		}

		public static bool HasMindRotScalar( Mobile m )
		{
			return m_Table.ContainsKey(m);
		}

		public static bool GetMindRotScalar( Mobile m, ref double scalar )
		{
			if (!m_Table.ContainsKey(m))
				return false;

			MRBucket tmpB = (MRBucket)m_Table[m];
			scalar = tmpB.m_Scalar;
			return true;
		}

		public static void SetMindRotScalar( Mobile caster, Mobile target, double scalar, TimeSpan duration )
		{
			if (!m_Table.ContainsKey(target))
			{
				m_Table.Add(target, new MRBucket(scalar, new MRExpireTimer(caster, target, duration)));
				BuffInfo.AddBuff(target, new BuffInfo(BuffIcon.Mindrot, 1075665, duration, target));
				MRBucket tmpB = (MRBucket)m_Table[target];
				MRExpireTimer tmpT = (MRExpireTimer)tmpB.m_MRExpireTimer;
				tmpT.Start();
				target.SendLocalizedMessage(1074384);
			}
		}

		private class InternalTarget : Target
		{
			private MindRotSpell m_Owner;

			public InternalTarget( MindRotSpell owner ) : base( Core.ML ? 10 : 12, false, TargetFlags.Harmful )
			{
				m_Owner = owner;
			}

			protected override void OnTarget( Mobile from, object o )
			{
				if ( o is Mobile )
					m_Owner.Target( (Mobile) o );
				else
					from.SendLocalizedMessage( 1060508 ); // You can't curse that.
			}

			protected override void OnTargetFinish( Mobile from )
			{
				m_Owner.FinishSequence();
			}
		}
	}

	public class MRExpireTimer : Timer
	{
		private Mobile m_Caster;
		private Mobile m_Target;
		private DateTime m_End;

		public MRExpireTimer( Mobile caster, Mobile target, TimeSpan delay ) : base( TimeSpan.FromSeconds( 1.0 ), TimeSpan.FromSeconds( 1.0 ) )
		{
			m_Caster = caster;
			m_Target = target;
			m_End = DateTime.UtcNow + delay;
			Priority = TimerPriority.TwoFiftyMS;
		}
		
		public void RenewDelay(TimeSpan delay)
		{
			m_End = DateTime.UtcNow + delay;
		}

		public void Halt()
		{
			Stop();
		}

		protected override void OnTick()
		{
			if ( m_Target.Deleted || !m_Target.Alive || DateTime.UtcNow >= m_End )
			{
				MindRotSpell.ClearMindRotScalar( m_Target );
				Stop();
			}
		}
	}

	public class MRBucket
	{
		public MRBucket(double theScalar, MRExpireTimer theTimer)
		{
			m_Scalar = theScalar;
			m_MRExpireTimer = theTimer;
		}

		public double m_Scalar;
		public MRExpireTimer m_MRExpireTimer;
	}
}